36 
No, 46, — Relief map of Missouri showing topographical and 
geological features and principal mining districts. 
No 47. — Relief map of the United States showing limits and 
theoretical curvature of the ancient ice sheet at the stage of the 
Glacial Period following the main silt epoch. Modelled on a sec- 
tion of a globe i6}4 feet in diameter. Scale, i inch equals 40 
miles. 
Relief Maps of Volcanoes and Volcanic Rej^ions. 
No. 51, — Relief map of the region of extinct volcanoes in 
Auvergne, Central France ; geological and topographical. Henri 
Le Coq and G. P. Scrope. 
No. 52. — Relief map of the Ice Spring craters, a group of 
extinct volcanoes near Fillmore, Utah, illustrating the successive 
formation and partial obliteration of craters and lava fields. 
Horizontal and vertical scales, 1:1200. 
No. 53. — Geological relief map of Mount JEtna, 
No. 54, — Geological relief map of Vesuvius and Monte 
Somma. 
No, 55, — Geological relief map of the Island of Palma. 
No, 56. — Geological relief map of the Island of Teneriffe. 
Maps of Ideal Reliefs. 
No, 61, — Relief of a volcanic island. 
No, 62. — Relief of a steep coast and dune coast, showing the 
two principal types of sea coast as they appear at ebb tide. 
No, 63. — Relief of a complete glacier. 
No, 64, — Relief illustrating the formation of valleys by 
erosion. 
Globes. 
Several globes are exhibited, one being 4 feet in diameter. 
Wall flaps. 
Among the wall maps shown may be mentioned: 
No, 70. — Topographic wall map of a portion of the west of 
Scotland, hatchured. Scale, i in. equals i mile. 
